diff --git a/open-sse/config/providerRegistry.ts b/open-sse/config/providerRegistry.ts
index 0d0b8c99..f929e7c4 100644
--- a/open-sse/config/providerRegistry.ts
+++ b/open-sse/config/providerRegistry.ts
@@ -265,14 +265,11 @@ export const REGISTRY: Record<string, RegistryEntry> = {
     },
     models: [
       { id: "claude-opus-4-6-thinking", name: "Claude Opus 4.6 Thinking" },
-      { id: "claude-opus-4-5-thinking", name: "Claude Opus 4.5 Thinking" },
-      { id: "claude-sonnet-4-5-thinking", name: "Claude Sonnet 4.5 Thinking" },
-      { id: "claude-sonnet-4-5", name: "Claude Sonnet 4.5" },
-      { id: "gemini-3-pro-high", name: "Gemini 3 Pro High" },
-      { id: "gemini-3-pro-low", name: "Gemini 3 Pro Low" },
-      { id: "gemini-3-flash-preview", name: "Gemini 3 Flash Preview" },
+      { id: "claude-sonnet-4-6", name: "Claude Sonnet 4.6" },
+      { id: "gemini-3.1-pro-high", name: "Gemini 3.1 Pro High" },
+      { id: "gemini-3.1-pro-low", name: "Gemini 3.1 Pro Low" },
       { id: "gemini-3-flash", name: "Gemini 3 Flash" },
-      { id: "gemini-2.5-flash", name: "Gemini 2.5 Flash" },
+      { id: "gpt-oss-120b-medium", name: "GPT OSS 120B Medium" },
     ],
   },
 
diff --git a/open-sse/services/model.ts b/open-sse/services/model.ts
index 3d88262b..38703bb6 100644
--- a/open-sse/services/model.ts
+++ b/open-sse/services/model.ts
@@ -22,9 +22,7 @@ const PROVIDER_MODEL_ALIASES = {
     "gemini-3-flash": "gemini-3-flash-preview",
     "raptor-mini": "oswe-vscode-prime",
   },
-  antigravity: {
-    "gemini-3-flash": "gemini-3-flash-preview",
-  },
+  antigravity: {},
 };
 
 // Reverse index: modelId -> providerIds that expose this model
diff --git a/open-sse/services/usage.ts b/open-sse/services/usage.ts
index 1f79f758..d1508855 100644
--- a/open-sse/services/usage.ts
+++ b/open-sse/services/usage.ts
@@ -318,14 +318,11 @@ async function getAntigravityUsage(accessToken, providerSpecificData) {
       // Filter only recommended/important models (must match PROVIDER_MODELS ag ids)
       const importantModels = [
         "claude-opus-4-6-thinking",
-        "claude-opus-4-5-thinking",
-        "claude-opus-4-5",
-        "claude-sonnet-4-5-thinking",
-        "claude-sonnet-4-5",
-        "gemini-3-pro-high",
-        "gemini-3-pro-low",
+        "claude-sonnet-4-6-thinking",
+        "gemini-3.1-pro-high",
+        "gemini-3.1-pro-low",
         "gemini-3-flash",
-        "gemini-2.5-flash",
+        "gpt-oss-120b-medium",
       ];
 
       for (const [modelKey, info] of Object.entries(data.models) as [string, any][]) {
diff --git a/src/shared/constants/cliTools.ts b/src/shared/constants/cliTools.ts
index d796ab6c..c9bb3a62 100644
--- a/src/shared/constants/cliTools.ts
+++ b/src/shared/constants/cliTools.ts
@@ -140,25 +140,28 @@ export const CLI_TOOLS = {
     description: "Google Antigravity IDE with MITM",
     configType: "mitm",
     modelAliases: [
-      "claude-opus-4-5-thinking",
-      "claude-sonnet-4-5-thinking",
-      "claude-sonnet-4-5",
-      "gemini-3-pro-high",
+      "claude-opus-4-6-thinking",
+      "claude-sonnet-4-6",
+      "gemini-3-flash",
+      "gpt-oss-120b-medium",
+      "gemini-3.1-pro-high",
+      "gemini-3.1-pro-low",
     ],
     defaultModels: [
-      {
-        id: "claude-opus-4-5-thinking",
-        name: "Claude Opus 4.5 Thinking",
-        alias: "claude-opus-4-5-thinking",
-      },
-      {
-        id: "claude-sonnet-4-5-thinking",
-        name: "Claude Sonnet 4.5 Thinking",
-        alias: "claude-sonnet-4-5-thinking",
-      },
-      { id: "claude-sonnet-4-5", name: "Claude Sonnet 4.5", alias: "claude-sonnet-4-5" },
-      { id: "gemini-3-pro-high", name: "Gemini 3 Pro High", alias: "gemini-3-pro-high" },
+      { id: "gemini-3.1-pro-high", name: "Gemini 3.1 Pro High", alias: "gemini-3.1-pro-high" },
+      { id: "gemini-3.1-pro-low", name: "Gemini 3.1 Pro Low", alias: "gemini-3.1-pro-low" },
       { id: "gemini-3-flash", name: "Gemini 3 Flash", alias: "gemini-3-flash" },
+      {
+        id: "claude-sonnet-4-6",
+        name: "Claude Sonnet 4.6",
+        alias: "claude-sonnet-4-6",
+      },
+      {
+        id: "claude-opus-4-6-thinking",
+        name: "Claude Opus 4.6 Thinking",
+        alias: "claude-opus-4-6-thinking",
+      },
+      { id: "gpt-oss-120b-medium", name: "GPT OSS 120B Medium", alias: "gpt-oss-120b-medium" },
     ],
   },
   // HIDDEN: gemini-cli
diff --git a/src/shared/constants/pricing.ts b/src/shared/constants/pricing.ts
index c2dd41b7..14a19090 100644
--- a/src/shared/constants/pricing.ts
+++ b/src/shared/constants/pricing.ts
@@ -223,14 +223,14 @@ export const DEFAULT_PRICING = {
 
   // Antigravity (ag) - User-provided pricing
   ag: {
-    "gemini-3-pro-low": {
+    "gemini-3.1-pro-low": {
       input: 2.0,
       output: 12.0,
       cached: 0.25,
       reasoning: 18.0,
       cache_creation: 2.0,
     },
-    "gemini-3-pro-high": {
+    "gemini-3.1-pro-high": {
       input: 4.0,
       output: 18.0,
       cached: 0.5,
@@ -244,34 +244,13 @@ export const DEFAULT_PRICING = {
       reasoning: 4.5,
       cache_creation: 0.5,
     },
-    "gemini-2.5-flash": {
-      input: 0.3,
-      output: 2.5,
-      cached: 0.03,
-      reasoning: 3.75,
-      cache_creation: 0.3,
-    },
-    "claude-sonnet-4-5": {
+    "claude-sonnet-4-6": {
       input: 3.0,
       output: 15.0,
       cached: 0.3,
       reasoning: 22.5,
       cache_creation: 3.0,
     },
-    "claude-sonnet-4-5-thinking": {
-      input: 3.0,
-      output: 15.0,
-      cached: 0.3,
-      reasoning: 22.5,
-      cache_creation: 3.0,
-    },
-    "claude-opus-4-5-thinking": {
-      input: 5.0,
-      output: 25.0,
-      cached: 0.5,
-      reasoning: 37.5,
-      cache_creation: 5.0,
-    },
     "claude-opus-4-6-thinking": {
       input: 5.0,
       output: 25.0,
@@ -279,6 +258,13 @@ export const DEFAULT_PRICING = {
       reasoning: 37.5,
       cache_creation: 5.0,
     },
+    "gpt-oss-120b-medium": {
+      input: 0.5,
+      output: 2.0,
+      cached: 0.25,
+      reasoning: 3.0,
+      cache_creation: 0.5,
+    },
   },
 
   // GitHub Copilot (gh)